X-Mozilla-Keys:                                                                                 
Chuck Dunlap wrote:

     >
     > P.S. do you know of a reasonalby priced (<$100.00)
     > scale that measures up to $500 lbs?

     Thats is a tough one. I have been looking for something like
     that for the past 30 years. Best use the garage door spring.

     >
     > Charlie Rosenzweig.
     > 9070 Ocean Beach Hwy.
     > Loongview, Wa.  98632
     > 360 577-6407.

Hi Paul - I bought a dynamometer scale that reads up to 500 lbs, with
a dial face about 6" diameter, 3/4" needle bearing attachment. Nice
quality unit for $75 (used in good condition) at Apache Reclamation in
Phoenix a couple months back. They had several. I'm going to use it to
measure static thrust.
Chuck Dunlap
RV-6 13B

Don't get too carried way on static thrust Chuck.
A high static thrust with a fixed pitch prop might
mean the pitch is too fine for good climb. 

Set the pitch so the engine bogs down to about
1900 prop RPM 4100 engine RPM static. 2.17:1 PSRU. The engine
should then pick up RPM and the thrust should increase
as you accelerate down the runway.

Paul Lamar
 
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